Book Errata: 7.3 Extension functions

[Lem Dulfo]

Paragraph 2, Sentence 1 of 7.3 Extension functions

For instance, we can create a toast function that doesn't the context as parameter, which could ...

Should it be like this:
For instance, we can create a toast function that doesn't need the context as parameter...

(Inserted "need")

[Antonio Leiva]

Thanks so much! Fixed and ready for the next release (hopefully in a few days).